Portable power-operated surface abrader



P. J. REITZ PORTABLE OWER-OPERATED SURFACE ABRADER Feb. 5, 1952 2 SHEETS-SHEET 1 Filed June 28, 1946 nlll HIIIE fl lur ill H E P. m Wu N m M in m 4 Feb. 5, 1952 P, J, n-z 2,584,738

PORTABLE POWER-OPERATED SURFACE ABRADER Filed June 28, 1945 \2 SHEETSSHEET 2 INVENTOR 1 404 J-fiE/TZ.

ATTORNEYS.

Patented Feb. 5, 1952 N'r sslcs PORTABLE POWER-OPERATED SURFACE ABRADEE Paul J. Reitz, Hamilton, Ohio, assignor of fortynine per cent to George Edward Dolch, Portland, Ind.

hpplicatidn ju'ne '28, 1946, Serial No. 680,202

My invention relates to a surface abrader for taking down and smoothing surfacea'such as floors, walls or the like, or any surface which is relatively flat.

The usual surface abrader uses as the abra- -A.

sive a sanding disc or the like which must be renewed when worn and which tends to scar or composition, linoleum, or any surface having a hardness less than the tempered abrader.

It is a further object of my invention to provide an abrader which is not interfered with by scattered nail heads or hardened spots, but which will cut the nail heads or the spots to the same plane and with substantially the same ease as the remaining portions of the surface.

It is a further object of my invention to provide an abrading cylinder which has an abrading surface which does not ridge or mark the surface being' abraded, but gives a smooth, flat finish.

It is a further object of my invention to provide such an abrader wherein the material teeth of my abraded from the surface is exhausted from the abrading cylinder and stored in a container such as a bag.

A further object of my invention is to provide a surface abrading machine which may abrade completely up to the edge of a surface such as a floor, so that the surface will be smooth and flat all the way to the walls.

It is a further object of my invention to provicle an abrader wherein the abrasive element or mechanism will wear out extremely slowly even when used upon the hardest surfaces.

These and other objects of my invention, which will be set forth hereinafter or will be apparent to one skilled in the art upon reading these specifications, I accomplish by that certain construction and arrangement of parts, of which I shall now describe an exemplary embodiment. Reference is now made to the drawings which form a part hereof and in which:

Figure 1 is a plan view of my abrading machine I with portions broken to indicate hidden parts.

Figure 2 is a side elevation of my abrading machine with portions broken away to show internal mechanism.

Figure 3 is a front elevation of my abrading 1 Claim. (01. 144-415) axial with the cylinder.

2 machine with portions cut away and shown in section to indicate concealed mechanism.

Figure 4 is a cross-section of my novel abrading cylinder taken on the section line "3 1 of Figure -2. k

Figure 5 is a side elevation of my abrading cylinder.

Figure 6 is a cross-section of the abrading cylinder taken on the section line 66 of Figure 5. Figure 7 is a perspective view of the fan blades positioned within the abrading cylinder. Figure 8 is a side elevation with portions broken away of a modified abrading machine. In the drawings and the description which follow, I have shown an abrading machine primarily for use in abrading floors. However, it is within the contemplation of my invention to provide an abrading machine which may be used on walls or vertical surfaces or even on ceilings.

Briefly, in the practice of my invention, I provide a frame carrying a driven abrading cylinder. The abrading cylinder carries teeth upon its peripheral surface arranged in a spiral and with the spacing between teeth forming a line non- The cylinder is hollow and there are apertures between each "tooth through which the material removed from the surface is sucked by fan blades within the cylindrical abrader. Vacuum means are applied to the cylinder and its surface for removing abrading material and storing it in a sack.

Referring to the drawings, I provide a rectangularly shaped frame l with opposite ends 2 and 3 dove-tailed into the frame I so as to be slidable in reference to the frame. Positioned on the bottom of the slides 2 and 3 are casters 4 which ride on the surface being abraded. A

screw member ii is positioned between the slides 2 and 3 and the frame 1 and by means of sprockets and a chain 8 actuated by a hand wheels, the slides 2 and 3 carrying the casters 4 may be moved in reference to the frame I.

Journaled in the frame I, I provide an abrading cylinder Ill. The cylinder is mounted on an axle II which rides in journals on the sideof the frame l.

Mounted on the frame I, I provide a motor I2 having a belt l3 which runs over a pulley I 4 attached to the abrading cylinder I0.

A chute I3 is adjacent a portion of the periphery of the abrading cylinder l0 and is attached to the intake of an exhaust pump l5. The exhaust pump I 5 is driven by a separate motor and discharges through the aperture it which may be attached to a bag I1.

The frame I with the mechanism carried thereby is moved about the surface by means of the usual handle terminating in a bail I8 which 18 attached to the frame I. v

The periphery of the abrading cylinder I 18 positioned slightly below the surface to be abraded by adjusting the plane determined by the casters 4 by means of the hand wheel 9.

I2 revolves the abrading cylinder I0 as well as the supplementary abrading cylinder I9 and cuts the surface to be abraded directly under the main cylinder I0 and the supplementary cylinder I9. Due to the fact that the supplementary abrading cylinder I9 is outside of the frame I, corners of floors or surfaces next to the wall may be abraded.

The novel abrading cylinder which I provide is shown in Figures 4 and 5 and consists of a hollow cylinder 2 I, upon the periphery of which is positioned a plurality of teeth 22. These teeth are spaced apart, as at 23, and follow each other around the periphery of the cylinder in a spiral, as shown in Figure 5. The spacing of the following teeth is such that the spacing line lengthwise -of the abrading cylinder I0 will be non-axial t0 the cylinder III. This positioning of the teeth 22 is quite important since it insures a tooth cutting each portion of the surface being abraded and not following each other to form ridges or grooves in the surface.

Between each of the teeth 22, I provide apertures 24 in the wall of the cylinder 2|, Within the cylinder 2I, I provide fan blades 25 of such configuration that upon revolving the cylinder 2 I, the fan blades 25 will intake through the apertures 24 and exhaust through the end of the cylinder 2 l.

The abrading cylinder I0 is revolved in a predetermined direction at all times, and the teeth 22 have a cutting edge 26 which cuts and abrades the surface upon which the machine is mounted.

In-practice, the teeth of the abrading cylinder I0 out material from the surface being abraded which is either picked up by the vacuum intake I5 through the hood I3, or is sucked through the apertures 24 and discharged from the end of the cylinder 2| into the hood I3.

I have shown in the figures a machine having for a relatively long time. Due to the sharpness of the teeth and their configuration and positioning on the periphery of the abrading cylinder, rel atively hard surfaces may be out and smoothed. In planing or abrading soft material, such as wooden floors, the teeth will shear off any nails which they contact and easily cut down any hardened portion, such as a knot.

The machine does not throw the material removed from the surface about, but picks it up in the vacuum pump and places it in the bag I! or an appropriate container.

From the above it is apparent that I have provided an abrading cylinder having a definitely configured abrading surface which not only cuts through the surface treated, but also forms a flat surface due to the positioning of the teeth on the periphery of the cylinder. It is also apparent that I have provided a machine for actuating and driving as well as positioning my novel abrading cylinder.

It is to be understood that modifications may be made in my invention'without departing from the spirit thereof, and I do not intend to limit myself otherwise than as pointed out in the claim which follows Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

An abrading device comprising a hollow cylinder with at least one open end mounted on a longitudinal axle spaced away from said cylinder by spokes, said spokes being configured as fan blades and a pulley on said axle for driving said cylinder, said cylinder having an abrading surface and a plurality of apertures communicating with said surface and the hollow interior, said abrading surface comprising a plurality of teeth having cutting edges and arranged in a spiral about the surface of the cylinder, said apertures being located between successive teeth on said spiral.

PAUL J. REITZ.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 290,439 Lee Dec. 18, 1883 1,002,678 Grondahl Sept. 5, 1911 1,011,490 Rasmesen Dec. 12, 1911 1,041,240 Chappell Oct. 15, 1912 1,060,041 Wagner Apr. 29, 1913 1,356,337 Clarke Oct. 19, 1920 1,374,345 Wolfe Apr. 12, 1921 1,406,275 Norman Feb. 14, 1922 1,735,594 Anderson Nov. 12, 1929 1,786,096 Theilman Dec. 23, 1930 2,437,668 Adams Mar. 16, 1948 FOREIGN PATENTS Number Country 7 Date 334,725 Great Britain Sept. 11, 1930 

